/usr/share/gvfs/mounts/network.mount is in gvfs-backends 1.20.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [Mount]
Type=network
Exec=/usr/lib/gvfs/gvfsd-network
AutoMount=true
|